CONFIGURING SERIAL PORTS
SNAP-LCM4 User’s Guide
15
To change the serial port configuration, set jumpers on the serial card for each port as illustrated in the
following sections.
Configuring Port 0
The default mode for COM0 is RS-232, and the wiring
diagram is shown on page
. Jumper groups JP3 and
CFG0 control COM0. Default jumper settings are shown in
the diagram at right. Note that only some of the jumpers
in JP3 control COM0; the jumpers shown grayed out are
included for reference only.
COM0 can also be configured for RS-485 two- or four-wire
or for use with a modem. Note that IRQ settings for COM0
cannot be configured.
Pin 1
Pin 1
Pin 1
Pin 1
